A monopolist discriminates the price of its product among two groups as follows: Q 1 = 100 - p 1 (demand of customers in group 1) Q 2 = XXXXXXXXXX5p 2 (demand of customers in group 2) TC = XXXXXXXXXXQ...

A monopolist discriminates the price of its product among two groups as follows:

 Q₁
= 100 - p₁
(demand of customers in group 1)

 Q₂
= 120 - 0.5p₂
(demand of customers in group 2)

 TC = 2000 + ( Q₁
+ Q₂)²
(total cost of production)

1. a) Find the optimal sales to the first, Q₁
   * , and to the second, Q₂
   * , group.


2. b) Find prices to be charged to the first, p₁
   * , and to the second, p₂
   * , group.


3. c) Find the profit of this firm.

            d) Show that the group with more elastic demand gets lower price.